Although the DIU driver creates five framebuffer devices, only the first
one controls the physical display. The remaining four are virtual "AOIs".
Therefore, the EDID data should be stored in the global fsl_diu_data
object, instead of the per-framebuffer object.
Signed-off-by: Timur Tabi <timur@freescale.com>
We don't use the writeback buffer, so don't initialize the registers for
that feature.
The default value for SYN_POL is already zero, so don't re-initialize it.
Writing the INT_STATUS register does nothing.
The value that we write to the PLUT register only makes sense on the
MPC8610 and P1022, so don't touch that register on the MPC5121.
Signed-off-by: Timur Tabi <timur@freescale.com>
Commit 4b5006ec ("shared DIU framebuffer support") added the ability to
retain the splash screen until the framebuffer is opened by user space.
Clean up this code to eliminate redundant writes to registers, and eliminate
the use of dummy area descriptor.
Signed-off-by: Timur Tabi <timur@freescale.com>
Remove functions request_irq_local() and free_irq_local(), and merge
their code into the functions that handle opening and closing the
framebuffer. We also improve the way that interrupts are enabled.
Also implement a work-around for broken U-Boots that leave the DIU
interrupts enabled.
Signed-off-by: Timur Tabi <timur@freescale.com>
The MPC5121 BSP comes with a gamma_set utility that initializes the gamma
table via an ioctl. Unfortunately, the ioctl number that utility uses
is defined improperly, but we can still support it.
Signed-off-by: Timur Tabi <timur@freescale.com>
Allow the platform code not to define a value for diu_ops.set_monitor_port.
This would be for platforms that only have one monitor port.
set_monitor_port() will never be called with an unsupported port anyway.
Signed-off-by: Timur Tabi <timur@freescale.com>
The various devm_ functions allocate memory that is released when a driver
detaches. This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.
Signed-off-by: Damien Cassou <damien.cassou@lifl.fr>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The THRESHOLDS register configures thresholds for two interrupts, but
these interrupts are not used in the DIU driver. An early version of the
driver may have used the "lines before vsync" interrupt, which requires
the LS_BF_VS of THRESHOLDS to be initialized.
Unfortunately, the initialization of this register does not do a
read-modify-write to set only LS_BF_VS. On the MPC8610, the value
written is correct. On other chips, like the P1022, the value overwrites
some reserved bits. This results in a performance drop on the P1022.
Since the default value is acceptable as-is on all SOCs, we should just
avoid touching this register.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Fix a compiler errors introduced in:
commit ddd3d90543
Author: Timur Tabi <timur@freescale.com>
drivers/video: fsl-diu-fb: merge all allocated data into one block
Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Functions fsl_diu_alloc() and fsl_diu_free() were only being called by
map_video_memory() and unmap_video_memory(), respectively.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The DIU driver requires some platform-specific functions to be defined,
but two them can be optional because most platforms implement them the
same way. Functions set_gamma_table() and get_pixel_format() are only
needed because of quirks in the Freescale MPC8610 HPCD reference board.
For other boards, a generic implementation works, so we shouldn't
require the platform code to define them.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The functions enable_lcdc() and disable_lcdc() used the variable fb_enable
to keep a reference count of when the display is enabled, but the code is
broken. The display is always disabled when disable_lcdc(), and it is
always enabled when enable_lcdc() is called, regardless of the value of
fb_enable. Obviously, we don't need to keep a reference count, so just
remove the variable.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The DIU uses system RAM for the framebuffer, so FBINFO_VIRTFB should be set.
Since the framebuffer is in system RAM, it can be read from more quickly
than written to, so FBINFO_READS_FAST should be set.
We can also set FBINFO_PARTIAL_PAN_OK for the same reasons.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Function init_fbinfo() is called only from install_fb(), and it's only a few
lines long. Plus, it ignores the return code from fb_alloc_cmap(). Merge
its contents into install_fb() and handle errors properly.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
"machine_data" is too long and clunky, and the "machine" part doesn't make
much sense, anyway.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The Freescale DIU driver allocates multiple blocks of memory, including
multiple DMA buffers. Merge all of these blocks into one data structure.
Specifically:
1) struct fsl_diu_data now contains everything that needs to be allocated,
except for the framebuffers themselves. DMA'able objects are aligned correctly
within the structure.
2) struct diu_addr is no longer needed, because we don't have to manage
multiple blocks of DMA memory.
3) Since there's no diu_addr any more, macro DMA_ADDR is used to calculate
the DMA address of any field in fsl_diu_data.
4) Functions allocate_buf() and free_buf() are no longer needed, because we
now assume that dma_alloc_coherent() will allocate a page-aligned block,
and everything is properly aligned with fsl_diu_data already, so we no longer
need to align any memory blocks ourselves.
5) The "dummy" area descriptor is now defined separately from the other
five ADs, so NUM_AOIS (previously called FSL_AOI_NUM) is now set to five
instead of six. Previously, all six were combined together to avoid a
separate call to allocate_buf() just for the dummy AD.
6) framebuffer_alloc() and framebuffer_release() are no longer used. The
framebuffer is initialized manually.
7) Error handling is simplified since there's only one memory buffer
allocated.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The diu_pool structure contains diu_addr objects for various objects
allocated in DMA space that are used by the DIU, but the only instance
of this structure is a global variable, 'pool'. Eliminate 'pool' by
merging its fields into the fsl_diu_data structure, which is instantiated
on the heap for each DIU controller found.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The diu_hw structure contains two fields used to access the DIU registers,
but the only instance of this structure is a global variable, 'dr'.
Eliminate 'dr' by merging its fields into the fsl_diu_data structure,
which is instantiated on the heap for each DIU controller found.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The Freescale DIU video controller supports five video "modes", but only
the first two are used by the driver. The other three are special modes
that don't make sense for a framebuffer driver. Therefore, there's no
point in keeping a global variable that indicates which mode we're
supposed to use.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The MFB_TYPE_xxx macros indicate different "operating modes" of each AOI,
but this feature is not actually used in the driver. The mfb_index.type
field is always set to MFB_TYPE_OUTPUT, so just delete it and any code
that references it.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Each of the five AOIs created by the DIU driver has a special purpose, and
they're not treated equally. It makes sense to identify them with an enum
instead of a hard-coded number.
Since the 'index' is now an enum, it can only contain allowed values, so
there's no need to check for an invalid value. This simplifies some other
code, such as fsl_diu_disable_panel(), which no longer needs to return an
error code.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Add the following new video modes to the Freescale DIU framebuffer driver:
640x480x60
640x480x72
640x480x75
640x480x90
640x480x100
800x480x60
800x600x60
854x480x60
1280x480x60
1280x720x60
1920x1080x60
Also add margin data to the 320x240 video mode. This mode was originally
intended only for the AOIs (overlays) used on planes two and three, but with
real margin data, it can now be used as an actual video mode.
Video mode data is from earlier work done by Jerry Huang
<Chang-Ming.Huang@freescale.com>.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The function which is supposed to provide screen blanking support doesn't
actually do anything, so the framebuffer layer thinks the screen has
been blanked when it really isn't. Remove the code completely for now.
A side-effect of this change is that the framebuffer console blanking now
works correctly. Presumably this is because the console now receives -EINVAL
instead of '0' when it asks the driver to blank the screen, so the console
does it manually now.
A signficant refactoring of the driver is planned, and proper hardware
blanking support will added afterwards.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Move several macros and structures from the Freescale DIU driver's header
file into the source file, because they're only used by that file. Also
delete a few unused macros.
The diu and diu_ad structures cannot be moved because they're being used
by the MPC5121 platform file. A future patch eliminate the need for
the platform file to access these structs, so they'll be moved also.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Use the _IOx macros to define the ioctl commands, instead of hard-coded
numbers. Unfortunately, the original definitions of MFB_SET_PIXFMT and
MFB_GET_PIXFMT used the wrong value for the size, so these macros have
new values now. To avoid breaking binary compatibility with older
applications, we retain support for the original values, but the driver
displays a warning message if they're used.
Also remove the FBIOGET_GWINFO and FBIOPUT_GWINFO ioctls. FBIOPUT_GWINFO
was never implemented, and FBIOGET_GWINFO was never used by any
application.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Uninstalling the framebuffers in reverse order is unnecessary and makes
the for-loop awkward.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
We were forgetting to unmap the video memory if fsl_diu_check_var() fails.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
It makes no sense to limit the size of a strncpy() to the length of
the source string.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Use the name "fsl-diu-fb" in the Freescale DIU framebuffer driver
during registrations.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Clean up the local variable usage in request_irq_local() and allocate_buf().
This streamlines the code without affecting functionality.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The framebuffer layer already uses the first video mode defined in the
fb_videomode array as a default, so there's no need to duplicate the
first entry into a stand-alone structure.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Implement various improvements to the way the Freescale DIU framebuffer
driver access the device tree.
1) Use of_iomap() instead of of_address_to_resource() and ioremap()
2) Use be32_to_cpup() instead of directly dereferencing the device_node
pointer.
3) Rename variable 'ofdev' to 'pdev' to avoid any confusion that it's
a platform_device pointer, not an of_device pointer (of_device no
longer exists).
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Fix this compilation warning in the Freescale DIU framebuffer driver:
warning: 'dummy_ad_addr' may be used uninitialized in this function
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Remove some unused ioctl commands, and treat those commands as unsupported
instead of ignored.
Also remove struct mfb_alpha, which isn't used by any ioctl. It may have
been once intended for MFB_SET_ALPHA, but that ioctl uses a different
data structure.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Remove debug printk messages (they don't help in debugging), replace
printk(KERN_xxx with its pr_xxx or dev_xxx equivalent, and add a couple
missing error messages.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Fix various indentation and line length problems in the Freescale
DIU framebuffer driver.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Instead of using ill-defined numbers (0, 1, and 2) for the monitor port, allow
the user to specify the port by name ("dvi", "lvds", or "dlvds"). This works
on the kernel command line, the module command-line, and the sysfs "monitor"
device.
Note that changing the monitor port does not currently work on the P1022DS,
because the code that talks to the PIXIS FPGA is broken.
Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
The Freescale DIU framebuffer driver defines two constants, MIN_PIX_CLK and
MAX_PIX_CLK, that are supposed to represent the lower and upper limits of
the pixel clock. These values, however, are true only for one platform
clock rate (533MHz) and only for the MPC8610. So the actual range for
the pixel clock is chip-specific, which means the current values are almost
always wrong. The chance of an out-of-range pixel clock being used are also
remote.
Rather than try to detect an out-of-range clock in the DIU driver, we depend
on the board-specific pixel clock function (e.g. p1022ds_set_pixel_clock)
to clamp the pixel clock to a supported value.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Get rid of users of of_platform_driver in drivers/video. The
of_platform_{,un}register_driver functions are going away, so the
users need to be converted to using the platform_bus_type directly.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
of_device is just an alias for platform_device, so remove it entirely. Also
replace to_of_device() with to_platform_device() and update comment blocks.
This patch was initially generated from the following semantic patch, and then
edited by hand to pick up the bits that coccinelle didn't catch.
@@
@@
-struct of_device
+struct platform_device
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: David S. Miller <davem@davemloft.net>
Adds support for encoding display mode information
in the device tree using verbatim EDID block.
If the EDID entry in the DIU node is present, the
driver will build mode database using EDID data
and allow setting the display modes from this database.
Otherwise display mode will be set using mode
entries from driver's internal database as usual.
This patch also updates device tree bindings.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
MPC5121 DIU configuration/setup as initialized by the boot
loader currently will get lost while booting Linux. As a
result displaying the boot splash is not possible through
the boot process.
To prevent this we reserve configured DIU frame buffer
address range while booting and preserve AOI descriptor
and gamma table so that DIU continues displaying through
the whole boot process. On first open from user space
DIU frame buffer driver releases the reserved frame
buffer area and continues to operate as usual.
Signed-off-by: John Rigby <jcrigby@gmail.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Some DIU structures will be used in platform code in
subsequent MPC5121 DIU patch, so we move this header
to be able to include it elsewhere.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
On MPC5121e Rev 2.0 re-configuring the DIU area descriptor
by writing new descriptor address doesn't always work.
As a result, DIU continues to display using old area descriptor
even if the new one has been written to the descriptor register of
the plane.
Add the code from Freescale MPC5121EADS BSP for writing descriptor
addresses properly. This fixes the problem for Rev 2.0 silicon.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
.name, .match_table and .owner are duplicated in both of_platform_driver
and device_driver. This patch is a removes the extra copies from struct
of_platform_driver and converts all users to the device_driver members.
This patch is a pretty mechanical change. The usage model doesn't change
and if any drivers have been missed, or if anything has been fixed up
incorrectly, then it will fail with a compile time error, and the fixup
will be trivial. This patch looks big and scary because it touches so
many files, but it should be pretty safe.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
The following structure elements duplicate the information in
'struct device.of_node' and so are being eliminated. This patch
makes all readers of these elements use device.of_node instead.
(struct of_device *)->node
(struct dev_archdata *)->prom_node (sparc)
(struct dev_archdata *)->of_node (powerpc & microblaze)
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Made necessary by 6992f53349 ("sysfs: Use
one lockdep class per sysfs attribute").
Prevents further "key xxx not in .data" bug-reports. Although some
attributes could probably be converted to static ones, this is left for
people having hardware to test.
Found by this semantic patch:
@ init @
type T;
identifier A;
@@
T {
...
struct device_attribute A;
...
};
@ main extends init @
expression E;
statement S;
identifier err;
T *name;
@@
... when != sysfs_attr_init(&name->A.attr);
(
+ sysfs_attr_init(&name->A.attr);
if (device_create_file(E, &name->A))
S
|
+ sysfs_attr_init(&name->A.attr);
err = device_create_file(E, &name->A);
)
While reviewing, I put the initialization to apropriate places.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Greg KH <gregkh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Mike Isely <isely@pobox.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Sujith Thomas <sujith.thomas@intel.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Timur Tabi